Sewing-machine.



J. W GURLEY.

SEWING MACHINE.

APPLICATION mso OCT. 21. 1914.

Patented June 12, 1917.

2 SHEETS-SHEET 1.

INVENTOR JOHN W. GURAEY BY M i/52%:

ATTORNEY J. W. GURLEY.

SEWING MACHINE.

APPLICATION FILED OCT. 21, 1914.

1,2%9,256 Patented June 12, 1917.

2 SHEETS-SHEET 2- 4 INVENTOR JOHN W., GURLEY ATTORNEY in site patina are JOHN w. G RLEY, or YoaKvILLn, new YORK, ASSIGNOR or ONEHALF 'ro w. o.

WEISKOTTEN, or UTICA, NEW YORK.

SEWING-MACHINE.

Specification of Letters Patent.

Patented June 12, 191 7..

Application filed October 21, 1914. Serial No. 867,879.

To all whom cit-may concern:

Be it known that 1, JOHN T. Gunner, a citizen of the United States, residing at Yorkville,.in the county of Oneida and State of New York, have invented certain new and useful Improvements in Sewing-lvlaehines of which the following is a specification, ref erence being had therein to the accompanying drawing.

My invention relates to a sewing machine, and I declare the following to be a full, clear, concise and exact deseriptioi'i thereof suflicient to enable anyone skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings in which like reference characters refer to like parts throughout the specification.

The object of the invention is to provide a, machine for making a tube of indefinite length by abutting the edges of a flat piece of fabric together. The edges, as thus abutted, are sewed with a zig zag stitch, whereby to make a flat seam. Heretofore, the machines for accomplishing the above mentioned work wvere found impractical when used to make a tube of unusual length, because of the limited extent of the tube that could be brought under the needle to be Fig. 4 is a perspective view of a lever;

Fig. 5 is a plan view of themaehine, looking upward from beneath;

Fig. 6 is a detail view of a guide member employed;

Fig. 7 is an enlarged plan view of a bobbin case, bobbin and hook employed;

Fig. 8 is an enlarged pcrspta-tive view of the feed dogs and the mechanism for actuating the same;

Fig. 9 is a detail view of the needle bar and the immediate parts;

Fig. 10 is a plan view of the presser foot, showing the fabric thereunder;

Fig. 11 is an enlarged perspective view of die presser foot;

Fig. 12 is an enlarged end elevation of a collar and stud employed for supporting one end of a hollow rock shaft;

Fig. 13 is a fragmentary view of the naster shaft, showing the gear thereon, the gcar with which it meshes, the shaft on which said second named gear is sup orted, and a cam, cam strap and part of a pitman for moving the needle transversely.

Referring more particularly to the drawings, the parts that are old and well known in the art, are the standard 2, supporting the overhanging arm 3 1n whih 1S 1ournaled the master shaft 1, connected with the pulley wheel 5, grooved for a belt, and disposed adjacent the hand wheel 6. To the opposite end of the master shaft 4 is rigidly secured the crank arm 7 counterbalanced by the sector weight 8. The crank arm 7 is fulcrumed to the pitman rod 9 pirotally connected to the collar 10 held to the needle bar 11 by the set screw 12. The upper end of the pitman rod 9 is enlarged at 13 which portion has pivotally mounted thereto a holloiit sleeye 14 adapted for the sliding movement of the spindle 15 rigidly held to the crescent shaped take up member 16 hav ng an aperture at 17 for the passage of the thread 105. The needle bar 11 is loosely mounted in the sleeves l84l8 of the swinging lever 18, fulcrumed at 19 to the shaft 20, secured to the portion 21 of the head 22. The lever 18 is actuated upon its fulcrum 19 by the pitman rod 23 having the eccentric strap 24, riding upon an eccentric 90, mounted to turn with the shaft 25, journaled by the gear :26, keyed thereto and in mesh with the gear 27 fixed to the master shaft 4. (See Fig. 13.) A headed pin 130 secured to the lower part 131 of the head 22 and projecting through an enlarged, elongated aperture 132 in the lever 18 aids in laterally guiding the lower end of said lever 18, whereby the same is prevented from wabbling. The presser foot 30 is divided at 31 for the reception of one end of the guide bar 32 held to the needle plate 33, having the recesses to alconnecting opposite end is rigidly low for the upward projection" and longitudinal movement of the feed dogs 35. The presser foot 30 is pivoted at 135 to the member 136, whereby to allow for a limited amount of rocking motion between the presser foot 30 and the feed dogs 35, for the passage of uneven portions of the fabric.- The member 136 is secured to the presser bar 36 by the screw 37. The upper end of the presser bar 36 has a collar 38 rigidly mounted thereon. Said collar 38 has an integral projection 10 adapted to slide in the guideway 11 formed in the shaft 42, depending from the portion 21 of the head 22. The bar 36 is urged downward normally by a spring disposed in the threaded sleeve 165. The sleeve is loosely mounted upon the presser bar 36 and has a lug 4-1 projecting through an enlarged aperture in the side of the head 22. Said sleeve 43 is held in assembled position on the presser bar 36 by the lug 4A thereof loosely contacting with the cam head 45, having bearings in the members ,46 integral with the head 22. The opposite end of the sleeve 13 bears against the collar 38, whereby to elevate the presser bar 36, when the cam head 45 is turned in its bearings 46 up into the dotted line position illustrated in Fig. 2. There is the usual thread tension device at 47.

The-parts that are new are, the base .1, the sprocket wheel 50, connected by a sprocket or Wiredfabrie chain, or belt 51 with the sprocket wheel 52, keyed to the shaft 53, having a bearing at one end in the member 54, integral with the frame 55, cast with the base 1 of the machine. The

other end of the shaft has hearings in the forked member 56, formed, also, as part of the frame The inner walls of the forked member/56 extend downward to provide a housing for the sprocket chain 57 the sprocket 58, keyed to the shaft 53 and the sprocket 59, keyed to the shaft 60. The sprockets 50, 52, 58 and 59 are all of the same diameter. To the shaft 60 is keyed the bevel gear wheel 61 in mesh with the beveled pinion 62, mounted to the end ofthe shaft 63, having a bearing in the depending portion 64 of the frame 55. The bevel gear 61 is to the pinion 62 in the ratio of 2 to 1. There is mounted, also, on the shaft 60, to turn therewith, the cam or eccentric 65 adapted to revolve within the strap 66 having a pitman rod 67, pivotally connected with one end of a link 68, Whose held to a hollow roe shaft 69. An arm 70 is mounted upon the hollow rock shaft 69 to turn therewith and is pivotally joined at its free endwith a square block 85 slidingly supported in the recess 71 of the feed dogs 35. has a bearing at The hollow rock shaft 69 one end in the depending 65 portion 14:0 of the-forward base 112 and at the feed dog rocker portion of the other end is supported by the stud 1 11 integral with the collar 142 loosely assembled to the shaft 63. The feed dogs are detachably secured upon the arm 72 fulcrumed upon the shaft 73, which is supported above the rock shaft 7 1 by the arms 7 5, pivoted at their upper ends to the shaft '73 and at their other ends rigidly secured or integral to the shaft 74, having bearings in the depending portions 121 of the forward base 112. A collar 7 6 is fixed upon the rock shaft 71 and has a depending link 77 pivotally united at its free end with the pitman rod 78 having an eccentric strap 79 in which revolves another eccentric, similar to the cam 65, mounted to turn with the shaft 60. The shaft 60 is supported by the bearings 8080 formed integral with the forward base 112 of the frame 55. The usual hook 94:, bobbin case, and bobbin 106 are mounted in the well known manner upon the free end of the shaft 63.

The oil cups 137 are disposed over their respective shafts, whereby to lubricate the same. A cam adjuster 150 is adapted to vary the throw of the cam on the shaft 60, under the strapT9, whereby to regulate the length of the stitch. Likewise, there is a similar cam adjuster for the cam 90, which adjuster is worked by a knurled screw 155, whereby to vary the throw of the cam 90 to regulate the width of the stitch.

A' casing 91, adapted to cover the mechanism in the head 22 is held in assembled position by'thefinger screw 92.

The operation of the machine is'e'li'ected by disposing the edges of the fabric 82 in the members lmving ;thc guide grooves 8l81, whereby to aid in assen'ibling the edges of the fabric for the convenient location under the presser foot 30 and the needle 3. The guide or linger 32 prevents the overlapping of said edges. After the said edges are arranged under the presser foot 30, the same is lowered by throwing down the cam head 45. The thread having been strung from a spool on a thread stand to an aperture in the peg 100, to the eye 161, to the orifice 102,

through the tension device 47, to the hole 17 of the take up member 16, to the guide 160,

to a thread guide situated adjacent the tension device 47, to the guide 161 on the lever 18, to the hole 162 of the needle bar 11, to the needle 93, the motor power is started, whereby to revolve the master shaft l, in order to turn the crank arm 7 and the sector weight 8, to thereby vertically reciprocate the needle bar 11 and the needle 93, through the connecting member, the pitman rod 9. As the needle 93 rises to its highest position, in each reciprocation, the end having the aperture 17 of the take up member 16 is elevated, whereby to take up the loose thread away from the point of the needle 93 and to draw the stitch. The take up 16 descends with thread 105 is caught by the hook each descent of the needle 93. Besides being vertically reciprocated, the needle 93 is transversely vi rated by the rocking of the lever 18, which is actuated by the pitman rod 23 united with the eccentric strap 24, adapted to turn upon the cam or eccentric 90, mounted to turn with the shaft 25,

whereby to make a zig zag stitch, as clearly illustrated in Figs. 1 and 10. The upper 9d and is carried around the bobbin 106 to engage the lower thread 107 of the bobbin, which thread 107 is drawn up by the upper thread 105 to sew the fabric, as is well known in the art. The bobbin 106 is held from turning with the hook 9-1 by the end 170 of the finger 171 (see Fig. 6). Each time the needle 93 rises, the feed dogs 35 are elevated against the fabric and the presser foot'30, whereby to grip the fabric preparatory to advancing the same, by the arm 70 rigidly connected to the rock shaft 69 which is turned by the arm 68 having one end fixedly secured to the rock shaft 69 and the other pivotally united to the pitman 67, actuated by the cam 65, upon the shaft 60, rotated by the sprocket and chain connection with the shaft 53, which in turn is rotated by the sprocket and chain connection with the master shaft 4. The said feed dogs 35 are moved longitudinally by the arm 72, pivotally mounted to the shaft 73, rocked by the arms 75, fixed to the shaft 74, connected by the collar 76 and the arm 7 7 with the pitman 78, actuated by the cam on the shaft 60, which is revolved, as above stalcd, through its intermediate sprocket and chain connection with the master shaft 4.

The breaking of the base -1, which is supported by the legs 110, at 111 and the rearrangement of the feed and the hook and bobbin mechanism below the forward base 112 of the frame 55, makes possible the feeding of the edges of a fabric to the needle 93, whereby to effect the sewing of a tube of indefinite length. The passageway formed at 120 gives free access, whereby the operator may loop the fabric 82 about the forward mechanism of the machine, so as to bring -1ng said looper and the edges of said fabric 82 together under the needle 93 to sew a tube of any desired length.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a sewing machine, the combination of amaster shaft, a needle, means connected with said master shaft for vertically reciprocating and transversely vibrating said needle, a presser foot, a feed dog, arms for elevating and longitudinally actuating said feed dog, whereby to advance a fabric to said needle, cams for actuating said arms, andbelts connected with said mastershaft to revolve said cams, whereby to sew a fabric of any given length.-

2. In a sewing machine, the combination of a frame having a depending portion carrying the looper and feed mechanism, a needle, means for vertically reciprocating and transversely vibrating said needle, a presser foot, a feed dog, arms for elevating and longitudinally actuating said feed dog, whereby'to advance the fabric to the needle, and belts for actuatirg said means for movfeed dog, whereby a tube of indefinite length may be sewed by said machine.

In a sewing machine, the combination of a frame having a depending portion carrying thelooper and feed mechanism, a needle, means for vertically reciprocating and transversely vibrating said needle, a prcsscr foot, a feed dog, arms connected with said feed dog, means for actuating said arms, whereby to elevate and longitudinally reciprocate said feed dog, cams for ac tuating said arms, a shaft for supporting said cams, and belts connecting said-shaft with the means for actuating said needle, whereby to revolve said shaft to actuate the feed dog.

In testimony whereof I have affixed my signature in the presence of two witnesses. JOHN ll". (lURLEY. lVitnesses V. O. VVEISKOTTEN, T. L. lVILDER. 

